Gasket construction



Nov. 28, 1944. A. w. 1.. HARTBAUER 2,363,524

GASKET CONSTRUCTION Filed March 24, 1941 2 Sheets-Sheet 1 4 /NI/E'NTOE.

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2 1944. A'. w. L. HARTBAUER D 3,524

GASKET CONSTRUCTION Filed March 24, 1941 2 Sheets$heet 2 /NI/E/Y TOP.

Patented Nov. 28, 1944 UNITED STATES PATENT OFFICE u a l l 2,ss,524

GASKET oo s'rnIio'rIoN, August w. L. Hartbauer, Chicago, Ill.Application March 24,1941, Serial No.1 384,917 l Claims. (01. -69) Thisinvention relates to a gasket and means for joining said gasket units oftwoor more pieces, preferably adapted for applicationto 'rail- 1 way carhatch and door arrangements.

i The construction herein shown is an improvement on that shown in myprior Patent No.

2,189,795, dated February 13, 1940. The features of improvement are inthe shape and disposition of the reinforcement and in its relation tothe corners of the gasket. Much is added. to the adaptability of thegasket for general use, the features of simplification of applicationflexibility in use being pronounced.

As I pointed out in my said prior patent, the

hatch closure and door arrangements in general these forms of closuresit is absolutely necessary to provide some form of perimeter edging thatwill yield, to compensate for variance in construction, to insure theseating of the plug or closure in ultimate closed position in botharrangements. The yielding edges of the hatch plug are usually formed byupholstering the edges. over a foundation of curled hair or the like.The yielding edges of the door parts are usually formed and of,

15 use in railway cars employ the plug design. In 1 with a wood slabspring actuated foundation and door parts or the bar body parts; Itisnecsattachment, and, in an annularly complete gasket :such as used onhatch doors, in the matter of flexibility at the corners orarigles.Thesefeaturesv are improved in the constructionhere disclosed. 1

In the drawings: i

Fig. 1 is a plan view showing'the contour of the cloth which coversthecore and forms the outer surface of the gasket and which shows thebifurcated end of the cloth and the slits employed for angle cornerassembly. i v 1 Fig.2 is a plan .view showing the contour of the clothwhich covers the core "and forms the outer surface of the'gasket andshows the tabs and slits employed for square corner assembly. Fig. 3 isa plan view showing the contour of sary that as the door arrangementunits are 7 the sponge rubber cores for angular .corner assembly.

Fig. 4 is a plan view showingthe rubber cores with butt ends for squarecorner assembly.

Fig. 5 is an enlarged .plan view showing the butt end of thespongerubber cores with the integral triangular shaped corner fillerportion moved into position forassembly. i

Fig. 6 is a plan view showing the assembly of the cloth and the spongerubbercores for angle type of corner assembly of the units.

Fig. '7 is a diagrammatic end viewshowing two sponge rubber coresassembled on the covering cloth. 7

.Fig. 8 is a diagrammatic end View showing an alternate method ofusingohesponge rubber core assembled on thecloth covering.

Fig. 9 is a plan view showing the assembly of the cloth and the spongerubbercores for square type corner assembly. i t

Fig. 10 shows a section of the preferred form of wire reinforcing usedin thegasket units. Fig. 11 shows a section of an alternatekind ofperforated metal or composition reinforcing that may be used in thegasketunits.

, Fig.';12 shows a section of still anotherkind of expanded metalreinforcing which may be used.

in the gasket units.

Fig: 13 is a. diagrammatic end elevation show- Fig. 14 is a diagrammaticend elevation showing the folded gasket sections completely formed withthe metal reinforcement encased by both edges of the cloth.

Fig. 15 is a diagrammatic end elevation. showing the alternate methodofencasing the reinforcing member by utilizing one marginal portion ofthe cloth and encasing the edge of the core with opposite marginal'clothportion.

Fig. 16 is a diagrammatic end elevation showing the encased reinforcingmember Fig. 15 moved into contact with the edge of the gasket.

Fig. 17 is a plan view of the gasket unit for angle corner assemblyshowing the metal reinforcing ,by dash lines. r i

Fig. 18.is a plan view. of the. gasket unit for i square corner assemblyshowing the metal reinforcing by dash lines.

Fig. 19 shows. the contour andthe slits in the cloth corner gusset witheither angular or square corner assembly. l i

Fig. 20 is a plan view of thean'gularcorner assembly lookingat thecontactsurface of the notches 5, 6, 1 and 8.

Fig. 24 is a cross sectional view 01111116 B--B- in Fig. 20 and showsthe flexing corner section encased by the gusset Fig. 19.

- treated surface of the cloth, thereby forming the flat sections of thegasket units as shown in Figs. 6- and 7.

Fig. 8 shows an alternate form of gasket unit section in which only onerubber core 30a is used, the contour being the sameas the core 30 g inFig. 6. The thickness of the core 30a is equal to the combined thicknessof the cores 29 and 31] Fig. is a plan view of a hatch closure gasketassembly showing four gasket units in applied position.

Fig. 26 is .a cross sectional View on line C,C Fig. 25 and shows etheflexing of the gasket. I

Fig. 27 is a cross sectional view showing the gasket'in service positionas applied to a refrigerator car door arrangement.

Fig. .28 is an isometric cross sectional view of the cloth coveringcemented together with the metal reinforcing therebetween on the lineA--A in Fig. 14.

Many of the features disclosed herein are similar to those shown in myprior patent and not illustrated in order to clarify the features ofnovelty.

In constructing the gasket units of the invenwaterproofed on one sideonly with cementitious or other suitable material, and then cut to thewidth and contour preferably as shown in Figs. .1 and 2. The clothcovering I for the angular .tion the cloth covering 1 is suitablytreated and corner assembly is provided with a square or butt end 2. Theparallel edges or marginal portions 3 and 4 arerelatively long and aregauged .as to their width and length by the dimensions of the Theoppositeend of the cloth covering l is bifurcated and slit to form thetabs .9, I0, I],

I 3 also constituting relatively short marginal portions of the clothcovering 1. The .short marginal portions 9 and 13 are in longitudinalalignment with the long portions 3 and 4.

' gitudinal alignment with the long marginal portions 16 and I1.

Gauging the Width of the parallel edge portions 3 and 4 as shown in Fig.1, and the parallel edges 16 and I1 shown in Fig. 2 is necessary toprovide integral cloth covering to encase l2 and 13 the sections 9 .and

the reinforcements shown in Fig. 10 and those shown Figs. 11' and 12.The length of the reinforcingwire is determined by the slots 5, 6., 1and Bin Fig. l and by the slots l8, I9, 20 and 22 in Fig.2. Fig. 3 showsthe sponge rubber cores 29 and 30 for the angular type ofcornerassembly, each provided with an integral triangular shaped corner fillertab 26 also shown in Fig. 5 and is adapted to be moved to thepositionindicated by I full lines in Fig. 5 and in alignment with the butt end21 of the cores 29 and3il to facilitate the assembly of the gasketunits. The opposite ends .shown in Fig. '7. The core 30a is cemented tothe cloth I thereby forming the flat section of the gasketunit as shownin Fig. 8.

Fig. 4 shows the sponge rubber cores 31 and 32 for square assembly 'withbutt ends 28. One sideof the cores 3| and-32 is coated with cement laand the cores are placed on the cloth l4- Fig. v9 contacting the treatedsurface of the cloth M, thereby forming the flat sections of the gasketunits as shown in Figs. 'Tand 9.. i a

To assemble the gasket units .31 and .38, fold the assemblies Figs. 6and 9 until the surfaces of the rubber cores 29 and 3.0 in Fig. 6 andthe surfaces of the cores 3| and 32 in Fig. 9 are in contact as shownFig. 13.

The assembly is continued by placing the angular formed reinforcing 33Fig. 1 0 or other suitable reinforcements such as 33a Fig. .11 and .331)Fig. 12 with the flange 34 in contact with the edges of the cores 29 and30 and the cores 3| and 32 shown in Figs. 6 and .9. The flange 35'of thereinforcing 33 Fig. 10 contacting the .marginal cloth portions 3 and I6shown Figs. 6 and 9 and the assembly as shown Fig. 13.

To complete the gasket units .31 and 38 fold the marginal edges 4 and 11Figs. 6 and 9 to encase the reinforcing wire .33 and forming theattachment flange 36 as shown in Fig. .14.

In the alternate method shown in Figs. .1 5 and 16 fold the clothassemblies shown in Figs. 5 arid 9 until the surfaces of the rubber.cores 2.9 and 30 Fig. .6 or the rubber cores 3] and 3.2 are in contactas'shown in Fig. .15. Ehcase the edges of said cores with the marginaledge 4 in Fig.6 or marginal edge 11 in Fig. .9 and join said marginaledges with the marginal edges 3 and B in Figs. 6 and 9.

To complete the assembly encase the angular shaped reinforcing .33 withthe marginal edges 4 Fig.5 or 1'7 Fig. .9 and then folding the .marginaledges 4- or I! Figs. 6 and .9 to place the encased reinforcing flange 34in contact with the edge of the cores as shown Fig. 16.. a

The exposed surface of the cloth and the reinforcing wire having beengiven a coat of cement la will :bond and amalgamate these parts togetherwith the reinforcing wire as pressure .is applied and as shown .Fig.2.8. i

The meshes of the reinforcing wire .33 offer unrestricted opposedcontact surface of the cloth I or 14 as a means of encasing said wirereen forcement 33 within the structures as shown Figs. 14,16 and-.28,completing the gasket units 31 Fig. 17 and Fig. 18 for unit 38.

In'order to join the gasket .units 31 Fig. 17 and alsothe units 38 forangular corner assembly Figs. 20 and 21, or square corner assembly F gs.22 and 23,.the butt end of one unit 31 is joined with the edges of theother cement Ia having been applied to the respective surfaces in ad;-vvance. The parts are then joinedtogether to form the joint 39 shown inFigs. 20 and 22. To

completethe assembly of the angle corner type; shown Figs. 20 and 21,the tabs 9 and 13 are brought to binding contact with the edges Ofl theunits and also a portion of the edges of the rubber. cores. The flange Iis joined with the flange l2 in Fig. 24 forming the flange 40 which,

encasesa portion of the tabs 9 and i3 and also the ends of the cores asshown in Figs..20 and 24.

The inner angular edges of the cores, are encased by a gusset 4|, Fig.19 by joiningthe tabs appliedto the peripheral edge 53 of the doorsection 54 with nails 52. The peripheral edge 55 of the door section56gcontacting the gasket 45 or unit thereof in the full closed positionof the I doors as shown;

WhatI claimand desire to secure by Letters Patent is:

42 with the edges of the units 31 and folding the gussets 4| in linewith the slits 43 the tabs 44 I and the folded portion are'then joinedwith the contact surface of the units whereby to seal and reinforcethecorner assembly. To complete the square corner assembly Figs. 22 and 23the tabs 23, 24 and 25 are brought intobindingcontact.

with the surfaces and the edge of the assembled units. The inner edgesof the cores are encased by the gusset 4| by joining the tabs 42 withthe edges of the. units and folding the gusset. 4|

in line with the slits 43 the tabs 44 and the folded portion are thenjoined with the contact surface of the units whereby to seal andreinforce the corner assembly. 4 i

The assembled gasket generally designated as. 45 is completed when theunit sections are joined at the corners as shown Fig. 25.

In some instances and especially pertaining to door applications,assembly of the units may not, be required, in these instances the unitsare appliedseparately and adapted to move into. contact as the door ismoved to the fully closed posi- 1. ma gasket, the combination of. a coreof resilient material, metal reinforcement, L- shaped in cross section,one leg lying against a side edge of said core and. the other legextending sub-. ;stantially parallel to and in a plane with one face ofsaid core, and fabric enclosing said core.

and reinforcement and adhesively secured to the parallel leg of saidreinforcement.

2. In a gasket, the combination of a flat sponge I rubber core, anL-shaped metal reinforcement, one flange of the reinforcement lyingagainst one side edge of the core and the other flange lying tion, therubber core of the gasket section yields ing to compensate forstructural variance to insure proper seal.

Figs. 25 and 26 show the hatch closure in which the frame sections 45are joined together at the corners in a substantial manner. The framesec-I tions 46 are shaped to provide a limiting surface 41 and thegasket bearing surface 48. .The assembled framesections are secured tothe metal cover 49 with bolts or screws, the lining I 50 is nailed tothe framememberslfi The resultant space 5| between the frame members andthe plate 49 is filled with suitable insulating material. I l

The assembled gasket 45 is applied to the bear- 1 ing surface 48 andsecured thereto by a series of nails 52 in the retaining flanges 36,best shown in Fig. 26.

The extending flange 34 of the wire reinforcing.

best shown Fig. 14 is. rigid and contacts the inner edges of the gasketrubber core sections to I i hold the gasket in nominal contact with thesurface 48 to which the gasket 45 is fastened best shown in Fig. 26andprovides the resistance which of the gasket. Thereby preventingloosening. of .the fastening element or damage to the gasket in theservice for which it is designed.

In Fig. 27 the gasket 45 or a unit thereof is prising metal strips ofangular cross-section, one l the other flange projecting laterallyinwardly 3 parallel to and substantiallyin the plane of one flat sideofthe core and extending laterally therefrom and fabric enclosing saidcore and rein forcement whereby when said gasket is secured to a supportby fastening meansthrough said lat- .eral flange, one edge of saidgasket is free.

3. In a gasket, the combination of a core cornposed of a plurality ofsections of sponge rubber, a section. of fabric surrounding said coreand having extended marginal edges, an angular metal reinforcement, oneflange of .the angle 1y: ing against a side edge of thecore and oneflange lying parallel to and substantially in the plane of a side of thecore and projecting laterally therefrom, the marginal edges of saidfabric overlying said reinforcement and adhesively secured thereto andto each other.

4. In an annularly complete gasket, the combination of a core composedof abutting sections, combined reinforcing and attachmentstrips exvtending throughout the length of the straight portions of the gasket,said reinforcement comfiange lying against an inside edge of the gasket,

parallel to, the bottomface of the gasket, and

fabric encasing said core and reinforcement, said reinforcement beinginterrupted at the corner angles of the gasket whereby to insure freedomof movement of the gasket at such corners.

5. In an annularly complete gasket having straight portions and angularportions, the coinbination of a core-composed of abutting sections,

combined reinforcing and attachment strips ex- I tendingthroughout thelength of the straight portions of the gasket, said reinforcementcomprising metal strips of angular cross-section, one flangelyingagainst an edge of the gasket, the

other flange projecting laterally parallel to. the bottom face of thegasket, and fabric encasing said core and reinforcement, extendingportions of said fabric being in overlapped secured connec-.

tion at the corner angles of the gasket providing a connection for thecore, and said reinforcement being interrupted. at the corner angles ofthe gasket whereby to insurefreedom of move ment of the gasket at suchcorners.

AUGUST W. L. HARTBAUER,

